/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import React, {
  ChangeEventHandler,
  FocusEvent,
  KeyboardEvent,
  useCallback,
  useState,
} from 'react';
import { t, styled } from '@superset-ui/core';
import { Input } from 'src/components/Input';
import { Tooltip } from 'src/components/Tooltip';

const TitleLabel = styled.span`
  display: inline-block;
  padding: 2px 0;
`;

const StyledInput = styled(Input)`
  border-radius: ${({ theme }) => theme.borderRadius};
  height: 26px;
  padding-left: ${({ theme }) => theme.gridUnit * 2.5}px;
`;

export interface AdhocMetricEditPopoverTitleProps {
  title?: {
    label?: string;
    hasCustomLabel?: boolean;
  };
  isEditDisabled?: boolean;
  onChange: ChangeEventHandler<HTMLInputElement>;
}

const AdhocMetricEditPopoverTitle: React.FC<
  AdhocMetricEditPopoverTitleProps
> = ({ title, isEditDisabled, onChange }) => {
  const [isHovered, setIsHovered] = useState(false);
  const [isEditMode, setIsEditMode] = useState(false);

  const defaultLabel = t('My metric');

  const handleMouseOver = useCallback(() => setIsHovered(true), []);
  const handleMouseOut = useCallback(() => setIsHovered(false), []);
  const handleClick = useCallback(() => setIsEditMode(true), []);
  const handleBlur = useCallback(() => setIsEditMode(false), []);

  const handleKeyPress = useCallback(
    (ev: KeyboardEvent<HTMLInputElement>) => {
      if (ev.key === 'Enter') {
        ev.preventDefault();
        handleBlur();
      }
    },
    [handleBlur],
  );

  const handleInputBlur = useCallback(
    (e: FocusEvent<HTMLInputElement>) => {
      if (e.target.value === '') {
        onChange(e);
      }

      handleBlur();
    },
    [onChange, handleBlur],
  );

  if (isEditDisabled) {
    return (
      <span data-test="AdhocMetricTitle">{title?.label || defaultLabel}</span>
    );
  }

  if (isEditMode) {
    return (
      <StyledInput
        type="text"
        placeholder={title?.label}
        value={title?.hasCustomLabel ? title.label : ''}
        autoFocus
        onChange={onChange}
        onBlur={handleInputBlur}
        onKeyPress={handleKeyPress}
        data-test="AdhocMetricEditTitle#input"
      />
    );
  }

  return (
    <Tooltip placement="top" title={t('Click to edit label')}>
      <span
        className="AdhocMetricEditPopoverTitle inline-editable"
        data-test="AdhocMetricEditTitle#trigger"
        onMouseOver={handleMouseOver}
        onMouseOut={handleMouseOut}
        onClick={handleClick}
        onBlur={handleBlur}
        role="button"
        tabIndex={0}
      >
        <TitleLabel>{title?.label || defaultLabel}</TitleLabel>
        &nbsp;
        <i
          className="fa fa-pencil"
          style={{ color: isHovered ? 'black' : 'grey' }}
        />
      </span>
    </Tooltip>
  );
};

export default AdhocMetricEditPopoverTitle;
